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Hubble Space Telescope UV spectral observations of Io passing into eclipse

Schneider, N.; Luhmann, J.; Clarke, J. T. +2 more

Time-resolved spectra of Io have been obtianed with the Faint Object Spectrograph on the Hubble Space Telescope in January 1992 at times centered on the passage of Io into Jupiter's shadow. Two different eclipse observations covered 1100-1600 Å and 2250-3300 Å. In the far-UV range, emission lines of atomic sulfur and oxygen from Io's atmosphere (s…

Auroral Lyman α and H₂ bands from the giant planets: 1. Excitation by proton precipitation in the Jovian atmosphere

Prange, Renee; Rego, Daniel; Gerard, Jean-Claude

This paper is part of a work aimed at modeling the ratio of the observed Jovian auroral intensity at H Lyman α and in the H₂ Lyman and Werner bands and interpreting them as diagnostic of the incident magnetospheric particle species and energy. The work is planned in three steps: (1) modeling of the volume excitation rate, (2) modeling o…